[Elecraft] K2 DSP Problem

[J F]

Thanks for the suggestion Lyle. I'll check that out. I
didn't have a speaker or headphones connected. From
the SEC menu, I was not able to turn the DSP on.
73,
Julius
n2wn


--- Lyle Johnson <kk7p at wavecable.com> wrote:

>  > Finally had a chance to work on some of my kits.
> > I had completed the DSP kit and just now am
> installing
> > it.
> > 
> > No smoke
> 
> That's good!
> 
> > but the red LED remains on.
> 
> That's not so good.
> 
>  >...
>  > Any suggestions?
> 
> The LED comes on when the DSPx resets, and goes off
> when it handshakes 
> with U1 on the KDSP2 board.
> 
> Do you have any audio?  If so, this indicates the
> DSPx is initializing 
> and the problem might be associated with the LED
> circuity or U1.
> 
> Can you get a display by pressing AFIL?  SF2 or CF2
> depending in mode, 
> for example. If so, this indicates that U1 is
> probably working and there 
> may be a PCB problem or a DSPx problem.  If not, U1
> may be the culprit.
> 
> If you can safely probe J1 20 (on the DSPx while
> plugged into the K2 and 
> switched on) you should see that pin 20 (DSPx reset)
> is pulsed to ground 
> at turn-on, then rises to something over 3V.  If it
> stays low, the DSPx 
> is always being held in reset. If it never goes low,
> the DSPx is not 
> getting reset.
> 
> 
> 73,
> 
> Lyle KK7P
> 
>